But she's nothing if not a hair chameleon, and over the weekend, she switched it up on us again: Christina went back to her famous platinum, in another icy shade that's perfect for the cooling temperatures. There's really nothing better than a refresher as the weather starts changing. (And if you're in need of one yourself, get inspired by these gorgeous hair colors just for fall.)

Now, she's back to her classic white blond—along with a statement glittery lip (channeling the beloved Pat McGrath trend we tried at the office). After a series of more modern, blunt haircuts—like the asymmetrical bob she got in June—it looks like she's kept her cut generally the same to really play up the bombshell look.

We love that Xtina isn't afraid to experiment with her look—but also isn't afraid of going back to her beauty past for inspiration. If you're feeling like you're stuck in a hair rut this season and want to switch things up, we have a few tips to help your hair color transition on to the cool weather ahead.